Question

An electron moved from shell n = 2 to shell n = 1. What most likely happened during the transition?

A. A fraction of a photon was added.
B. A photon of energy was absorbed.
C. A fraction of a photon was removed.
D. A photon of energy was released.

Answer 1

Explanation:

If electron goes from higher shell to lower shell

then it losses energy

so option

D.)A photon of energy was released.

is correct